/*
 *  Copyright © 2021-2023 Innospots (http://www.innospots.com)
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License. You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package io.innospots.base.re.function.date;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.time.Instant;
import java.time.ZoneId;
import java.time.temporal.ChronoUnit;

/**
 * 时间戳间隔时间
 *
 * @author Smars
 * @date 2021/9/5
 */
public class TsDiff {

    private static final Logger logger = LoggerFactory.getLogger(TsDiff.class);

    /**
     * 比较两个时间的时间差，按指定时间单元
     *
     * @param timeUnit
     * @param startTs
     * @param endTs
     * @return
     */
    public static long diffTs(String timeUnit, Long startTs, Long endTs) {
        return ChronoUnit.valueOf(timeUnit).
                between(Instant.ofEpochMilli(startTs).atZone(ZoneId.systemDefault()).toLocalDateTime()
                        , Instant.ofEpochMilli(endTs).atZone(ZoneId.systemDefault()).toLocalDateTime()
                );
    }
}
